Letters of Euripides showing devout image (5)
I believe the answer is:
pieta
This might be a double definition.
'letters of euripides' is the first definition.
The definition suggests a singular noun which matches the answer.
'devout image' is the second definition.
(image of the Virgin Mary holding Jesus' body)
'showing' acts as a link.
(Other definitions for pieta that I've seen before include "Status of Virgin with body of Christ" , "mournful image" , "Religious depiction" , "Artistic portrayal of the Virgin holding Jesus on her knee" , "Religious work resulting" .)